What happens to a cow when there is a rise in air temperature and humidity? Negative outcomes increase. Using a temperature-humidity index (THI) can help you identify the different levels of heat stress and how different ranges can negatively affect cow performance. See the chart that helps you pinpoint when to begin adjusting management and nutrition to minimize the impact of heat stress on your dairy herd.

Learn more about heat stress in the milking herd, plus how it can affect dry cows and the calf she is carrying. Get useful tools for minimizing the impact heat stress can have on your herd from our very own Hélène Leclerc. Check out her article:

Heat stress is detrimental to cows; protected B vitamins can help

This article appeared in Progressive Dairyman.